Japanese summary calls Claude Duet a proactive agent on Opus 5.5

What the research found

Japanese breaking-news summary of Claude Duet, a proactive Anthropic agent research preview announced October 21 2026 on Opus 5.5, with confirmation gates for sends, payments and deletions; secondary source, not hands-on verified, and not available in Japan.

Claims and how well the evidence supports them

1. Claude Duet was announced October 21 2026 as a research preview with Claude Opus 5.5 as the core model 71%
2. Duet requires user confirmation before sending messages, payments, signing or deleting 99%
3. Duet does not perform securities trading or transfers between accounts 99%

Evidence

• note.com https://note.com/doerstokyo_kb/n/n482a4a16a972?hl=en

Actionability rated low.